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Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Derivative Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Sep. 18, 2023
Derivative [Line Items]
Total current derivative assets	$ 20,141	$ 0
Total noncurrent derivative assets	34,505	3,531	$ 3,200
Primrose Bio
Derivative [Line Items]
Total noncurrent derivative assets	3,937	3,531
Equity Option | Agenus, Inc.
Derivative [Line Items]
Total current derivative assets	4,908	0
Total noncurrent derivative assets	$ 9,130	0
Derivative, term of contract (in years)	5 years
Collars | Viking
Derivative [Line Items]
Total current derivative assets	$ 15,233	0
Partner Programs | Agenus, Inc.
Derivative [Line Items]
Total noncurrent derivative assets	$ 21,438	$ 0

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483466/210-20-50-3

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483466/210-20-50-3

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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